Inheritance - General Questions (2)

Which of the following should be used to implement a 'Has a' relationship between two entities?

What will be the output of the C#.NET code snippet given below?

namespace IndiabixConsoleApplication
{
class Baseclass
{
public void fun()
{
Console.Write("Base class" + " ");
}
}
class Derived1: Baseclass
{
new void fun()
{
Console.Write("Derived1 class" + " ");
}
}
class Derived2: Derived1
{
new void fun()
{
Console.Write("Derived2 class" + " ");
}
}
class Program
{
public static void Main(string[ ] args)
{
Derived2 d = new Derived2();
d.fun();
}
}
}

Which statement will you add in the function fun() of class B, if it is to produce the output "Welcome to IndiaBIX.com!"?

namespace IndiabixConsoleApplication
{
class A
{
public void fun()
{
Console.Write("Welcome");
}
}
class B: A
{
public void fun()
{
// [*** Add statement here ***]
Console.WriteLine(" to IndiaBIX.com!");
}
}
class MyProgram
{
static void Main (string[ ] args)
{
B b = new B();
b.fun();
}
}
}

What will be the size of the object created by the following C#.NET code snippet?

namespace IndiabixConsoleApplication
{
class Baseclass
{
private int i;
protected int j;
public int k;
}
class Derived: Baseclass
{
private int x;
protected int y;
public int z;
}
class MyProgram
{
static void Main (string[ ] args)
{
Derived d = new Derived();
}
}
}

Which of the following statements are correct about the C#.NET code snippet given below?

namespace IndiabixConsoleApplication
{
class index
{
protected int count;
public index()
{
count = 0;
}
}
class index1: index
{
public void increment()
{
count = count +1;
}
}
class MyProgram
{
static void Main(string[] args)
{
index1 i = new index1();
i.increment();
}
}
}

1 count should be declared as public if it is to become available in the inheritance chain.

2 count should be declared as protected if it is to become available in the inheritance chain.

3 While constructing an object referred to by i firstly constructor of index class will be called followed by constructor of index1 class.

4 Constructor of index class does not get inherited in index1 class.

5 count should be declared as Friend if it is to become available in the inheritance chain.

Which of the following statements should be added to the subroutine fun( ) if the C#.NET code snippet given below is to output 9 13?

class BaseClass
{
protected int i = 13;
}
class Derived: BaseClass
{
int i = 9;
public void fun()
{
// [*** Add statement here ***]
}
}

Which of the following can be facilitated by the Inheritance mechanism?

1 Use the existing functionality of base class.

2 Overrride the existing functionality of base class.

3 Implement new functionality in the derived class.

4 Implement polymorphic behaviour.

5 Implement containership.